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Windows 7: The classpnp.sys horror...help.

As recently as the other day, I switch the pc off normally, expecting the same as usual, blah blah, but the next day, on booting up, the system just hangs at the "Starting Windows" screen for no reason.

Using safe mode don't work, hangs on the aforementioned file. I can't restore or repair either - hangs also.

i have noticed other people have had problems with this as well, and Ive followed previous efforts - i.e. running Ubuntu from a disc, and copying another x64 W7 copyof the file onto my system to see if that worked. Nothing.

While having a search round on forums for solutions, and leaving it to just sit there, it decides to burst into life and go into windows. Thought nothing of it, and decided this morning to restart it and see what happens, and low and behold, it goes back to what it did the pervious day, and just hangs.

Many posts i've seen have been people with HP, dell etc laptops/desktops. Mine's custom built, with these specs:

Appreciate that but you don't need Windows to boot up to follow the Start Up repair. You need to set your PC to boot from the CD drive first. When you switch on, before getting to the Starting Windows screen you should see the bios screen that gives the "Boot Sequence" Key. It usually says "Boot Up F10" or similar depending on your Bios version. Press the appropriate key BEFORE Windows starts to boot up. If you miss it, switch off and try again. You might have to try a few keys to get the Boot Sequence Up . When you get it use the direction arrows to choose CD ROM Drive. The mouse won't work at this stage.
Then you should be able to follow th instructions in the Guide I linked to.
Come back here if you need more help

Ive started work on the problem. Followed instructions, but the installation was so slow - its taken an hour to get to the windows 7 CD install to get to recovery - and so far its got further this time.

Im trying to restore to a point on 22/07/10 (2 critical points ago) - and its just failed...

System restore failed to extract file classpnp.sys from the restore point as it was damaged. ???

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